<div class="form">
    <form name="login" action="<?php echo site_url("users/login"); ?>" method="post">
        <label for="username">Username:</label>
        <input type="text" name="username" /><br />
        <label for="username">Password:</label>
        <input type="password" name="password" /><br />
        <input class="submitbutton" type="submit" name="submit" value="Login" />
    </form>
</div>
